javaScript operating DOM object Chapter III Operating JavaScript DOM object

Chapter III Operating JavaScript DOM object

 

DOM: Document Object Model Document Object Model

DOM Category: Dom core; HTML Dom; Css Dom;

First, according to the hierarchical access node:

　　　Returns the parent node parentNode
　　　childNodes returns the set of child nodes, childNodes [I]
　　　the firstChild Returns the first child node, the most common usage is to access the text node element
　　　lastChild Returns the last child node of
　　　the next node nextSibling
　　　previousSibling a node

Second, resolve browser compatibility issues:　

　　firstElementChild returns the first child node of the most common usage is to access the text of an element node
　　lastElementChild return to the last child node of
　　the next nextElementSibling a node
　　on a node previousElementSibling

　　例如：ONext = OParent.nextElementSibling || OParent.nextSibling

Third, the node information:

　　nodeName: Node Name

　　nodeValue: node value

　　nodeType: Node Type

Fourth, the operation node style:

<Script type = "text / JavaScript">
    // first way: element style properties .style
    function whtmouseover () {
        // let Joe Smith Font color green becomes small
        . document.getElementById ( "zs") style = .fontSize "15px";
        . document.getElementById ( "zs") style.color = "Green";
    };
   
   
    function whtmouseout () {
        // let Joe Smith small font color green
        document.getElementById ( "zs" ) .style.fontSize = "8px";
        document.getElementById ( "ZS") style.backgroundColr = "Pink";.
    };
   
   
    // the second way: the element .className previously created value named .className in style the style list
    function lbmouseover () {
        the Document. getElementById("zhao").className="zhao";
    };
   
    function lbmouseout(){
        document.getElementById("zhao").className="zhao";
    };
   
   
    //第三种方式：元素.style.cssText="css属性值"
    function llmouseover(){
        document.getElementById("ww").style.cssText="color:red;font-size:10px";
    }
    function llmouseout(){
        document.getElementById("ww").style.cssText="color:black;font-size:60px";
    }
</script>
五、元素属性：　

　　Returns the current element offsetLeft its distance from the left edge of the left boundary of the parent element, the read-only attribute
　　offsetTop Returns the current element border to its distance from the boundary of the parent element, the read-only attribute
　　offsetHeight height of the return element
　　offsetWidth return element's width
　　offsetParent return offset container element, i.e. the recent dynamic positioning of a reference element comprising
　　returns the vertical scroll position matching elements scrollTop
　　the scrollLeft return horizontal scroll position matching elements
　　clientWidth return element visible width
　　clientHeight visible height of the return element

Sixth, the element attributes apply:　

　　document.documentElement.scrollTop;
　　document.documentElement.scrollLeft;

 

　　or

　　document.body.scrollTop;
　　document.body.scrollLeft;

Seven, making fixed ad:

　　

adver var;
        the window.onload = function () {
            adver = document.getElementById ( "adver");
        }
        // the onscroll: the scroll bar to scroll trigger
        window.onscroll = function () {
            // Get the size of the scroll bar to scroll
            var scorlltop = || document.body.scrollTop document.documentElement.scrollTop;
            var = scorllleft document.documentElement.scrollLeft || document.body.scrollLeft;
            // follower scroll bar elements with changes
            adver.style.top = scorlltop + 30 + "px " ;
            adver.style.left scorllleft = 10 + + "PX";
        }

 

DOM: Document Object Model Document Object Model

DOM Category: Dom core; HTML Dom; Css Dom;

First, according to the hierarchical access node:

　　　Returns the parent node parentNode
　　　childNodes returns the set of child nodes, childNodes [I]
　　　the firstChild Returns the first child node, the most common usage is to access the text node element
　　　lastChild Returns the last child node of
　　　the next node nextSibling
　　　previousSibling a node

Second, resolve browser compatibility issues:　

　　firstElementChild returns the first child node of the most common usage is to access the text of an element node
　　lastElementChild return to the last child node of
　　the next nextElementSibling a node
　　on a node previousElementSibling

　　例如：ONext = OParent.nextElementSibling || OParent.nextSibling

Third, the node information:

　　nodeName: Node Name

　　nodeValue: node value

　　nodeType: Node Type

Fourth, the operation node style:

<Script type = "text / JavaScript">
    // first way: element style properties .style
    function whtmouseover () {
        // let Joe Smith Font color green becomes small
        . document.getElementById ( "zs") style = .fontSize "15px";
        . document.getElementById ( "zs") style.color = "Green";
    };
   
   
    function whtmouseout () {
        // let Joe Smith small font color green
        document.getElementById ( "zs" ) .style.fontSize = "8px";
        document.getElementById ( "ZS") style.backgroundColr = "Pink";.
    };
   
   
    // the second way: the element .className previously created value named .className in style the list of styles
    function lbmouseover () {
        document.getElementById ( "Zhao"). className = " zhao";
    };
   
    function lbmouseout(){
        document.getElementById("zhao").className="zhao";
    };
   
   
    //第三种方式：元素.style.cssText="css属性值"
    function llmouseover(){
        document.getElementById("ww").style.cssText="color:red;font-size:10px";
    }
    function llmouseout(){
        document.getElementById("ww").style.cssText="color:black;font-size:60px";
    }
</script>
五、元素属性：　

　　Returns the current element offsetLeft its distance from the left edge of the left boundary of the parent element, the read-only attribute
　　offsetTop Returns the current element border to its distance from the boundary of the parent element, the read-only attribute
　　offsetHeight height of the return element
　　offsetWidth return element's width
　　offsetParent return offset container element, i.e. the recent dynamic positioning of a reference element comprising
　　returns the vertical scroll position matching elements scrollTop
　　the scrollLeft return horizontal scroll position matching elements
　　clientWidth return element visible width
　　clientHeight visible height of the return element

Sixth, the element attributes apply:　

　　document.documentElement.scrollTop;
　　document.documentElement.scrollLeft;

 

　　or

　　document.body.scrollTop;
　　document.body.scrollLeft;

Seven, making fixed ad:

　　

adver var;
        the window.onload = function () {
            adver = document.getElementById ( "adver");
        }
        // the onscroll: the scroll bar to scroll trigger
        window.onscroll = function () {
            // Get the size of the scroll bar to scroll
            var scorlltop = || document.body.scrollTop document.documentElement.scrollTop;
            var = scorllleft document.documentElement.scrollLeft || document.body.scrollLeft;
            // follower scroll bar elements with changes
            adver.style.top = scorlltop + 30 + "px " ;
            adver.style.left scorllleft = 10 + + "PX";
        }